FR2152589B1 - - Google Patents
Info
- Publication number
- FR2152589B1 FR2152589B1 FR7230906A FR7230906A FR2152589B1 FR 2152589 B1 FR2152589 B1 FR 2152589B1 FR 7230906 A FR7230906 A FR 7230906A FR 7230906 A FR7230906 A FR 7230906A FR 2152589 B1 FR2152589 B1 FR 2152589B1
- Authority
- FR
- France
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/50—Component parts or details of props
- E21D15/51—Component parts or details of props specially adapted to hydraulic, pneumatic, or hydraulic-pneumatic props, e.g. arrangements of relief valves
- E21D15/512—Arrangement of valves
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Safety Valves (AREA)
- Control Of Presses (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2146502A DE2146502C3 (en) | 1971-09-17 | 1971-09-17 | Valve arrangement for setting hydraulic pit rams with high setting force |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2152589A1 FR2152589A1 (en) | 1973-04-27 |
FR2152589B1 true FR2152589B1 (en) | 1974-08-19 |
Family
ID=5819839
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7230906A Expired FR2152589B1 (en) | 1971-09-17 | 1972-08-31 |
Country Status (4)
Country | Link |
---|---|
US (1) | US3776098A (en) |
DE (1) | DE2146502C3 (en) |
FR (1) | FR2152589B1 (en) |
GB (1) | GB1409751A (en) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2537715C3 (en) * | 1975-08-23 | 1980-11-06 | Saarbergwerke Ag, 6600 Saarbruecken | Pressure reducing valve arrangement and design for the connection of the two pressure chambers of a two-stage telescopic pit ram |
US4007826A (en) * | 1976-04-02 | 1977-02-15 | Stephens-Adamson, Inc. | Dual pressure take-up apparatus and system for dual belt conveyor-elevator |
US4089171A (en) * | 1976-05-24 | 1978-05-16 | Webster Electric Company, Inc. | Four position valve assembly |
DE2724264C2 (en) * | 1977-05-28 | 1985-12-19 | Robert Bosch Gmbh, 7000 Stuttgart | Follow-up adjustment device for a hydraulic machine |
DE2749312C2 (en) * | 1977-11-04 | 1984-12-20 | Gewerkschaft Eisenhütte Westfalia, 4670 Lünen | Control device with automatic repositioning for hydraulic ram removal |
DE2830510C3 (en) * | 1978-07-12 | 1981-07-23 | Bergwerksverband Gmbh, 4300 Essen | Method and valve arrangement for setting the stamps of a walking support |
DE2914884C2 (en) * | 1979-04-12 | 1987-05-14 | Gewerkschaft Eisenhütte Westfalia GmbH, 4670 Lünen | Control device for a hydraulic ram removal with associated automatic repositioning |
DE3015411C2 (en) * | 1980-04-22 | 1982-10-28 | Hermann Hemscheidt Maschinenfabrik Gmbh & Co, 5600 Wuppertal | Stamp control |
DE3123278C1 (en) * | 1981-06-12 | 1982-12-16 | Hermann Hemscheidt Maschinenfabrik Gmbh & Co, 5600 Wuppertal | Control for a hydraulic prop of a self-advancing support assembly |
GB2137314B (en) * | 1983-03-26 | 1986-07-23 | Dobson Park Ind | Valve for mine support |
GB2214988A (en) * | 1988-02-13 | 1989-09-13 | Gullick Dobson Ltd | Control system for hydraulic mine roof support |
DE10328286B4 (en) * | 2003-06-23 | 2015-05-13 | Caterpillar Global Mining Europe Gmbh | Hydraulic shield removal |
CN110716591A (en) * | 2019-11-20 | 2020-01-21 | 南理工泰兴智能制造研究院有限公司 | Pressure regulating device of mine working environment and safety artificial intelligence simulation equipment |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1103036A (en) * | 1912-06-07 | 1914-07-14 | Bridgeport Brass Co | Controlling mechanism for hydraulic presses and the like. |
US1428998A (en) * | 1921-04-25 | 1922-09-12 | Buckeye Iron & Brass Works | Valve for cake-forming presses |
US1805367A (en) * | 1929-04-18 | 1931-05-12 | Ronald T King | Automatically operated press |
US2391930A (en) * | 1942-12-01 | 1946-01-01 | Albert R Stone | Power transmission system |
DE1135849B (en) * | 1958-05-22 | 1962-09-06 | Kronprinz Ag | Process and filling device for setting and loading purely hydraulic pit punches |
-
1971
- 1971-09-17 DE DE2146502A patent/DE2146502C3/en not_active Expired
-
1972
- 1972-08-31 FR FR7230906A patent/FR2152589B1/fr not_active Expired
- 1972-09-15 GB GB4284672A patent/GB1409751A/en not_active Expired
- 1972-09-15 US US00289711A patent/US3776098A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
US3776098A (en) | 1973-12-04 |
GB1409751A (en) | 1975-10-15 |
DE2146502B2 (en) | 1979-08-30 |
DE2146502C3 (en) | 1982-04-29 |
DE2146502A1 (en) | 1973-03-22 |
FR2152589A1 (en) | 1973-04-27 |
Similar Documents
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |